<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue.js"></script>
    <style>
        .yy {
            width: 250px;
            height: 250px;
            background-color: aquamarine;
        }

        .parent {
            width: 180px;
            height: 180px;
            background-color: bisque;
        }

        .child {
            width: 100px;
            height: 100px;
            background-color: blueviolet;
        }
    </style>
</head>

<body>
    <div id="app">
        <!-- 表单修饰符 lazy trim number -->
        <!-- <h3>1.表单修饰符</h3> -->
        <!-- <div>val:{{val}}</div>
        <input type="text" v-model.lazy.trim="val">
        <input type="text" v-model.trim="val"> -->

        <!-- 2.鼠标按键修饰符 .left .right -->
        <!-- <button @click="_click(0)">点击事件</button>
        <button @click.left="_click(1)">点击事件.left</button>
        <button @click.right="_click(2)">点击事件.right</button> -->

        <!-- 3.v-bind属性修饰符   camel(openDoor)  prop-->
        <!-- <input type="text" :name=""  :value=""  :index.prop="1"> -->

        <!-- 4.事件修饰符   -->
        <!-- 
            .prevent 阻止默认行为
            .stop 阻止事件传播
            .self 触发的目标元素是自己才执行
            .capture 实现事件（监听）
            .once 一次性事件绑定
         -->
        <!--  .prevent 阻止默认行为 -->
        <button @contextmenu.prevent="yj">鼠标右击事件</button>
        <!-- .stop 阻止事件传播 -->
        <div class="yy" @click="_yy()">
            yy
            <div class="parent" @click="_parent()">
                parent
                <div class="child" @click.stop="_child()">
                    child
                </div>
            </div>
        </div>
        <!-- .self 触发的目标元素是自己才执行 -->
        <div class="yy" @click.self="_yy()">
            yy
            <div class="parent" @click="_parent()">
                parent
                <div class="child" @click="_child()">
                    child
                </div>
            </div>
        </div>

        <!-- .capture 实现事件（监听） -->
        <div class="yy" @click.capture="_yy()">
            yy
            <div class="parent" @click.capture="_parent()">
                parent
                <div class="child" @click="_child()">
                    child
                </div>
            </div>
        </div>
        <!--  .once 一次性事件绑定 -->
        <button @click.once="_once()">once</button>

        <!-- 
          键盘事件修饰符
              .left 左键
              .right 右键
              .up 上键
              .down 下键
              .enter 回车
              .13 键码
        -->
        <input type="text" @keyup.up.13="_keyup">
    </div>
    <script>
        new Vue({
            el: "#app",
            data: {
                val: ""
            },
            methods: {
                _click(n) {
                    console.log(n);
                },
                yj() {
                    console.log(123);
                },
                _yy() {
                    console.log("_yy");
                },
                _parent() {
                    console.log("_parent");
                },
                _child() {
                    console.log("_child");
                },
                _once() {
                    console.log(123);
                },
                _keyup(e) {
                    console.log(e.target.value);
                }
            },
        })
    </script>
</body>

</html>